2353040021 has 2 divisors, whose sum is σ = 2353040022. Its totient is φ = 2353040020.

The previous prime is 2353040017. The next prime is 2353040051. The reversal of 2353040021 is 1200403532.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1248208900 + 1104831121 = 35330^2 + 33239^2 .

It is a cyclic number.

It is not a de Polignac number, because 2353040021 - 2² = 2353040017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2353039975 and 2353040002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2353040051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1176520010 + 1176520011.

It is an arithmetic number, because the mean of its divisors is an integer number (1176520011).

Almost surely, 2^2353040021 is an apocalyptic number.

It is an amenable number.

2353040021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2353040021 is an equidigital number, since it uses as much as digits as its factorization.

2353040021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 2353040021 is about 48508.1438626547. The cubic root of 2353040021 is about 1330.0759413551.

Adding to 2353040021 its reverse (1200403532), we get a palindrome (3553443553).

The spelling of 2353040021 in words is "two billion, three hundred fifty-three million, forty thousand, twenty-one".